Heart rate monitor confusion !!!

[HornetMaX]

As far as I can see, the only thing that does not use the c2 pushed data is the Intensity Minutes: it keeps on using the HR recorder by the Garmin optical HR instead of using the HR sent by the c2 log. Because of that, it miscomputes that by a mile, at least for indoor rowing: today I did a 10min warmup (avg pace 2:15), a 4x1000m with 6min rest (avg pace 1:54) and a 10min avg cooldown (pace 2:29): the intensity minutes are respectively 0, 22 and 17: it doesn't make sense, it's simply due to the optical HR being totally off.

I stand corrected, what I wrote above is wrong: even the intensity minutes are computed from the c2 forwarded data (assuming HR data is in there). I verified this today by logging a 4x1000m + 6R session on both the ErgZone and the Garmin (at the same time).

The numbers iIsaw last time draw me to the wrong conclusion because to earn intensity minutes, you have to he in the zone for at least 10min (moderate zone and vigorous zone independently). So on occasions, for short intervals, you don't reach that by 30sec and you get 0 minutes.

So that's clarified, so that's one more reason to just get the c2 data forwarded instead of logging on the Garmin.

BTW, I noticed some silly numbers in the activity stats:

• When logged directly on the Garmin: during rest intervals the power stays at the last value, so the overall avg power is off and total work is off a lot (because it really thinks you've kept outputting power during your rest intervals, doh).
• When forwarded by c2 logbook: the avg power is terribly off (hard to understand, in the logbook it says 240W avg, and that's computed only during work intervals, not rest, but in the Garmin page it says 24W) and the total work is hence off too, in a manner that is not even consistent with the 24W average. Weird.

There're also issues in some interval data (in case of variable intervals).

So yeah, none of the two solutions (logging on the Garmin or just forwarding from the c2 logbook) seems perfect.
I'll probably stick to the one that is less hassle (c2 forwarding only), and call it a day.

[Ron Ginsberg]

Turns out I'm too fat for the polar chest strap ! Found that Garmin hrm dual fits, but don't know which watch is compatible ? Google isn't ant help lol.

I think the Polar will fit because I actually think they sell it in sizes and it isn't expensive. Just about any type of sensor and strap will do if you use the PM5 monitor as it receives Garmin, Ant, and Polar.

[bigsimon123]

Thanks for the reply. I went for the Garmin HRM dual £40, and it fits the bigger boned man ! Only negative is it doesn't pair directly to the Connect app. You have to pair it with the watch, then upload it.